diff --git a/Lib/_colorize.py b/Lib/_colorize.py
index 8361ddbea89716..fd0ed2f93b2d6d 100644
--- a/Lib/_colorize.py
+++ b/Lib/_colorize.py
@@ -334,6 +334,7 @@ class LiveProfiler(ThemeSection):
 @dataclass(frozen=True, kw_only=True)
 class Syntax(ThemeSection):
     prompt: str = ANSIColors.BOLD_MAGENTA
+    error: str = ANSIColors.BOLD_RED
     keyword: str = ANSIColors.BOLD_BLUE
     keyword_constant: str = ANSIColors.BOLD_BLUE
     builtin: str = ANSIColors.CYAN
diff --git a/Lib/_pyrepl/commands.py b/Lib/_pyrepl/commands.py
index 10127e58897a58..a52ac8889018be 100644
--- a/Lib/_pyrepl/commands.py
+++ b/Lib/_pyrepl/commands.py
@@ -289,8 +289,10 @@ def do(self) -> None:
                     r.select_item(r.historyi + 1)
                     r.pos = r.eol(0)
                     return
-                r.pos = len(b)
-                r.error("end of buffer")
+                if r.pos == len(b):
+                    r.error("end of buffer")
+                else:
+                    r.pos = len(b)
                 return
 
             if (
diff --git a/Lib/_pyrepl/reader.py b/Lib/_pyrepl/reader.py
index f35a99fb06a3f9..3c1ce72f834233 100644
--- a/Lib/_pyrepl/reader.py
+++ b/Lib/_pyrepl/reader.py
@@ -196,6 +196,7 @@ class Reader:
     ps3: str = "|.. "
     ps4: str = R"\__ "
     kill_ring: list[list[str]] = field(default_factory=list)
+    error_prefix: str = "! "
     msg: str = ""
     arg: int | None = None
     dirty: bool = False
@@ -641,7 +642,11 @@ def finish(self) -> None:
         pass
 
     def error(self, msg: str = "none") -> None:
-        self.msg = "! " + msg + " "
+        error_prefix = self.error_prefix
+        if self.can_colorize:
+            t = THEME()
+            error_prefix = f"{t.error}{error_prefix}{t.reset}"
+        self.msg = error_prefix + msg
         self.dirty = True
         self.console.beep()
 
diff --git a/Lib/_pyrepl/readline.py b/Lib/_pyrepl/readline.py
index 8d3be37b4adeec..2cce542a73d28e 100644
--- a/Lib/_pyrepl/readline.py
+++ b/Lib/_pyrepl/readline.py
@@ -124,9 +124,6 @@ def __post_init__(self) -> None:
         self.commands["backspace_dedent"] = backspace_dedent
         self.commands["backspace-dedent"] = backspace_dedent
 
-    def error(self, msg: str = "none") -> None:
-        pass  # don't show error messages by default
-
     def get_stem(self) -> str:
         b = self.buffer
         p = self.pos - 1
diff --git a/Lib/test/test_pyrepl/test_pyrepl.py b/Lib/test/test_pyrepl/test_pyrepl.py
index 8a3cae966a6e05..026e8ba91361f5 100644
--- a/Lib/test/test_pyrepl/test_pyrepl.py
+++ b/Lib/test/test_pyrepl/test_pyrepl.py
@@ -212,13 +212,15 @@ def test_down_arrow_end_of_input(self):
         events = itertools.chain(
             code_to_events(code),
             [
+                # Go left first to avoid end of buffer error.
+                Event(evt="key", data="left", raw=bytearray(b"\x1bOD")),
                 Event(evt="key", data="down", raw=bytearray(b"\x1bOB")),
             ],
         )
 
         reader, console = handle_all_events(events)
         self.assertEqual(reader.cxy, (0, 2))
-        console.move_cursor.assert_called_once_with(0, 2)
+        console.move_cursor.assert_called_with(0, 2)
 
     def test_left_arrow_simple(self):
         events = itertools.chain(
@@ -236,13 +238,15 @@ def test_right_arrow_end_of_line(self):
         events = itertools.chain(
             code_to_events("11+11"),
             [
+                # Go left first to avoid end of buffer error.
+                Event(evt="key", data="left", raw=bytearray(b"\x1bOD")),
                 Event(evt="key", data="right", raw=bytearray(b"\x1bOC")),
             ],
         )
 
         reader, console = handle_all_events(events)
         self.assertEqual(reader.cxy, (5, 0))
-        console.move_cursor.assert_called_once_with(5, 0)
+        console.move_cursor.assert_called_with(5, 0)
 
     def test_cursor_position_simple_character(self):
         events = itertools.chain(code_to_events("k"))